when you buy a laptop, the manufacturer always put their own customed sowftware on it.
but if you do a full format ( wipe every thing like your "specialist" did ) you will loose the custom setup ( instalation of the pc form manufactor ) like you did now.
was there not a recovery disc or enny thing when you bought the pc?
is there nothing under drivers on your spesific laptop you can download from driver download from asus's page?